Linux is a popular platform for everything from middleware to embedded computing and clusters, to parallel supercomputers and gadgets. Anyone who knows what they are doing is welcome to develop for the core, and submit patches. All controllers are different, but they usually have registers which control them. A block …

Whenever we refer to a file or directory we are using one of these paths. Popular distributions include Debian, Fedora, Mint, and Ubuntu, but there are many others. The CPU can access both the system space memory and the I/O space memory, whereas the controllers themselves can only access …

The access file logs every visit to your web site. For example, a processor could execute an instruction every clock pulse. A way to prevent that is regular updates and only download software, themes and plugns form reliable sources. It looks at each member of the operations pending queue (sem_pending …

Because Linux has such a large number of contributors from across multiple decades of development, contacting each individual author and getting them to agree to a new license is virtually impossible, so that Linux remaining licensed under the GPLv2 in perpetuity is all but assured. Linux tracks the usage of …

The issues with the Diebold [2] voting systems in the US is testament [3] to the need for transparent systems that are trustworthy. In the above example, the vfat and msdos modules are both dependent on the fat module and so it has a count of 2. For Linux, a …

Therefore, an alias definition appearing on the same line as another command does not take effect until the next line of input is read. Let's face it; Windows OS is vulnerable to different types of attacks (or hacks). Grep will take the output for that command, which is the name …

Linux is open-source. With all the activity around Unix at Berkeley, a new delivery of Unix software was born: the Berkeley Software Distribution, or BSD. Furthermore, the developer writing Python or Ruby or Scala can still benefit from knowledge of system programming, as an understanding of the soul of the …

Public domain refers to the total absence of copyright protection. Normally, Linux would suspend the requestor, putting the process onto a wait queue until there is enough physical memory. It sounds counterintuitive and/or just plain stupid on paper, but is generally seen as the traditional and conservative way to …

In addition to the real uid, each process also has an effective uid, a saved uid, and a filesystem uid. The terminal in Linux is a wild card. Whereas sockets communicating over the Internet might use a hostname and port pair for identifying the target of communication, Unix domain sockets …